Thank you Operations_Monkey - yeah - we did the rebuild several times - no joy there.  The duplicate undeposited funds account still exists and seems to be the new home for SOME newly received checks and credit card income.  I do believe that the file corruption and subsequent repair caused the new account to appear as maybe QB deemed the old Undeposited Funds "invalid" or non-existent which caused QB to create a new account.

There is an option under Edit>Preferences>Payments>Company Preferences to NOT use Undeposited Funds as the default account.